For the past 25 years, Addario has been at the helm of expeditions to recover what he believes is a 1600s Spanish shipwreck off the eastern coast of the Sunshine State.

His interest was piqued in 1987, when two surfers who’d fallen off their boards mentioned to him that they’d seen a cannon half-buried underwater.

Addario was running daily boating trips, not treasure hunting, in those days. "We had no idea that was a whole shipwreck there," Addario told BusinessNewsDaily. "Within the first week, we discovered four more cannons and lots and lots of coins."

"Once you start researching everything, it makes it even more exciting," said Addario, who says the bestpart is the emotional rush of putting his hands on something that had been lost for 400 years. "It is almost better than sex."

Jupiter Wreck's expeditions consist of six-member teams working with a number of vessels, skiffs and specialized equipment.

At the heart of the operation is the Motor Research Vessel named Enterprise, a 65-foot foil-assisted aluminum catamaran. The boat is equipped with unique undersea mobile excavation and sand bypassing and transferring technology.

"There is still so much more to explore," Addario said. "Every time we dive, we find something new."

"There is no question in our minds it is a Spanish ship," Addario said. All of the coins are [dated] between 1652 and 1659."

Addario believes the actual wreckage is buried 45 feet under the ocean's floor.

He has faced some challenges, including a legal battle with the state of Florida over the wreckage and the site.

While courts have named Jupiter Wreck the shipwreck's custodian, they have also granted the state permission to restrict Addario and his team from using any machinery to dig up sand to find the rest of it.

"This has been going on for 24 years," Addario said of the frustrating legal battle.

While Addario said the items he has recovered are worth millions of dollars, he adds that finding the ship, or possible ships, below the ocean's surface could reveal a treasure trove of ancient remnants.

"The payoff could be enormous," he said.

Already, though, Addario said the quarter-century voyage has been well worth it.

"I am real proud of what I have accomplished," Addario said. "It has just been one adventure after another."

Chad Brooks is a Chicago-based freelance business and technology writer who has worked in public relations and spent 10 years as a newspaper reporter. You can reach him at chadgbrooks@gmail.com or follow him on Twitter @cbrooks76.